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Solubility of uranium in hydrothermal fluids at 25°-300°: Implications for the formation of uranium deposits

Citation

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Abstract

The present report provides a compilation of thermodynamic data for geologically relevant uranium species suitable for geochemical
equilibrium calculations from low to moderate temperatures (up to 300°C). It also reports a set of diagrams displaying the
solubility of key uranium ore minerals (uraninite, coffinite and carnotite) and the stability of uranium and vanadium complexes
at temperatures between 25° and 300°C. Further, it discusses mass-balance calculations of fluid-rock reactions at temperatures
up to 200°C relevant to understanding the behaviour of uranium in unconformity-related uranium and sediment-hosted stratiform
copper-uranium deposits.